UIColor的使用及拓展

来源：互联网发布：新开的淘宝店怎么刷单编辑：程序博客网时间：2024/05/16 12:57

//Xcode5.0系统中UIColor有这么几种关于UIColor的方法，我们简单介绍几种方法的用途。

UILabel * lable = [[UILabel alloc]initWithFrame:CGRectMake(100, 100, 30, 30)];    lable.backgroundColor = [UIColor redColor];    [self.view addSubview:lable];/* + (UIColor *)colorWithWhite:(CGFloat)white alpha:(CGFloat)alpha; + (UIColor *)colorWithHue:(CGFloat)hue saturation:(CGFloat)saturation brightness:(CGFloat)brightness alpha:(CGFloat)alpha; + (UIColor *)colorWithRed:(CGFloat)red green:(CGFloat)green blue:(CGFloat)blue alpha:(CGFloat)alpha; + (UIColor *)colorWithCGColor:(CGColorRef)cgColor; + (UIColor *)colorWithPatternImage:(UIImage *)image; */    //直接赋值    lable.backgroundColor = [UIColor redColor];    //用RGB颜色自己定制颜色，alpha是透明度    lable.backgroundColor = [UIColor colorWithRed:225 green:215 blue:0 alpha:1];    //用图片作为lable的颜色，    lable.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"2.png"]];    //这里的新问题就是图片的大小怎么设置    //直接设置lable的大小    UILabel * lable1 = [[UILabel alloc]initWithFrame:CGRectMake(100, 100, 30, 30)];    //将lable设置为背景的大小    //方法1    UILabel * lable2 = [[UILabel alloc]initWithFrame:CGRectMake(0, 0,self.view.bounds.size.width,self.view.bounds.size.height) ];    //方法2    UILabel * lable3 = [[UILabel alloc]initWithFrame:[UIScreen mainScreen].bounds];

帮助：苹果电脑中自带RGB识别软件：数码测色计

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